eugenis updated this revision to Diff 97901.
Repository:
rL LLVM
https://reviews.llvm.org/D32886
Files:
include/clang/Driver/Options.td
include/clang/Driver/SanitizerArgs.h
include/clang/Frontend/CodeGenOptions.def
lib/CodeGen/BackendUtil.cpp
lib/Driver/SanitizerArgs.cpp
lib/Frontend/CompilerInvocation.cpp
test/CodeGen/asan-globals-gc.cpp
test/Driver/fsanitize.c
Index: test/Driver/fsanitize.c
===================================================================
--- test/Driver/fsanitize.c
+++ test/Driver/fsanitize.c
@@ -126,6 +126,13 @@
// RUN: %clang -target x86_64-linux-gnu -fsanitize=address %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-ASAN-WITHOUT-USE-AFTER-SCOPE
// CHECK-ASAN-WITHOUT-USE-AFTER-SCOPE: -cc1{{.*}}address-use-after-scope
+// RUN: %clang -target x86_64-linux-gnu -fsanitize=address -fsanitize-address-globals-live-support %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-ASAN-GLOBALS
+// RUN: %clang -target x86_64-linux-gnu -fsanitize=address %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-NO-ASAN-GLOBALS
+// RUN: %clang_cl -target x86_64-windows-msvc -fsanitize=address -fsanitize-address-globals-live-support -### -- %s 2>&1 | FileCheck %s --check-prefix=CHECK-ASAN-GLOBALS
+// RUN: %clang_cl -target x86_64-windows-msvc -fsanitize=address -### -- %s 2>&1 | FileCheck %s --check-prefix=CHECK-ASAN-GLOBALS
+// CHECK-ASAN-GLOBALS: -cc1{{.*}}-fsanitize-address-globals-live-support
+// CHECK-NO-ASAN-GLOBALS-NOT: -cc1{{.*}}-fsanitize-address-globals-live-support
+
// RUN: %clang -target x86_64-linux-gnu -fsanitize-memory-track-origins -pie %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-ONLY-TRACK-ORIGINS
// CHECK-ONLY-TRACK-ORIGINS: warning: argument unused during compilation: '-fsanitize-memory-track-origins'
Index: test/CodeGen/asan-globals-gc.cpp
===================================================================
--- test/CodeGen/asan-globals-gc.cpp
+++ test/CodeGen/asan-globals-gc.cpp
@@ -1,5 +1,16 @@
-// RUN: %clang_cc1 -fsanitize=address -emit-llvm -o - -triple x86_64-windows-msvc %s | FileCheck %s --check-prefix=WITH-GC
-// RUN: %clang_cc1 -fsanitize=address -emit-llvm -o - -triple x86_64-windows-msvc -fdata-sections %s | FileCheck %s --check-prefix=WITH-GC
+// RUN: %clang_cc1 -fsanitize=address -fsanitize-address-globals-live-support -emit-llvm -o - -triple x86_64-linux %s | FileCheck %s --check-prefix=WITHOUT-GC
+// RUN: %clang_cc1 -fsanitize=address -fsanitize-address-globals-live-support -fdata-sections -emit-llvm -o - -triple x86_64-linux %s | FileCheck %s --check-prefix=WITH-GC
+// RUN: %clang_cc1 -fsanitize=address -fsanitize-address-globals-live-support -fno-integrated-as -fdata-sections -emit-llvm -o - -triple x86_64-linux %s | FileCheck %s --check-prefix=WITHOUT-GC
+// RUN: %clang_cc1 -fsanitize=address -fsanitize-address-globals-live-support -fno-integrated-as -emit-llvm -o - -triple x86_64-linux %s | FileCheck %s --check-prefix=WITHOUT-GC
+// RUN: %clang_cc1 -fsanitize=address -fdata-sections -emit-llvm -o - -triple x86_64-linux %s | FileCheck %s --check-prefix=WITHOUT-GC
+
+// RUN: %clang_cc1 -fsanitize=address -fsanitize-address-globals-live-support -fno-data-sections -emit-llvm -o - -triple x86_64-windows-msvc %s | FileCheck %s --check-prefix=WITH-GC
+// RUN: %clang_cc1 -fsanitize=address -fsanitize-address-globals-live-support -fdata-sections -emit-llvm -o - -triple x86_64-windows-msvc %s | FileCheck %s --check-prefix=WITH-GC
+// RUN: %clang_cc1 -fsanitize=address -fdata-sections -emit-llvm -o - -triple x86_64-windows-msvc %s | FileCheck %s --check-prefix=WITHOUT-GC
+
+// RUN: %clang_cc1 -fsanitize=address -fsanitize-address-globals-live-support -fno-data-sections -emit-llvm -o - -triple x86_64-apple-macosx11 %s | FileCheck %s --check-prefix=WITH-GC
+// RUN: %clang_cc1 -fsanitize=address -fsanitize-address-globals-live-support -fdata-sections -emit-llvm -o - -triple x86_64-apple-macosx11 %s | FileCheck %s --check-prefix=WITH-GC
+// RUN: %clang_cc1 -fsanitize=address -fdata-sections -emit-llvm -o - -triple x86_64-apple-macosx11 %s | FileCheck %s --check-prefix=WITHOUT-GC
int global;
Index: lib/Frontend/CompilerInvocation.cpp
===================================================================
--- lib/Frontend/CompilerInvocation.cpp
+++ lib/Frontend/CompilerInvocation.cpp
@@ -777,6 +777,8 @@
Opts.SanitizeAddressUseAfterScope =
A->getOption().getID() == OPT_fsanitize_address_use_after_scope;
}
+ Opts.SanitizeAddressGlobalsLiveSupport =
+ Args.hasArg(OPT_fsanitize_address_globals_live_support);
Opts.SSPBufferSize =
getLastArgIntValue(Args, OPT_stack_protector_buffer_size, 8, Diags);
Opts.StackRealignment = Args.hasArg(OPT_mstackrealign);
Index: lib/Driver/SanitizerArgs.cpp
===================================================================
--- lib/Driver/SanitizerArgs.cpp
+++ lib/Driver/SanitizerArgs.cpp
@@ -568,6 +568,12 @@
AsanUseAfterScope = A->getOption().getID() ==
options::OPT_fsanitize_address_use_after_scope;
}
+
+ // This is a workaround for a bug in gold and enabled by default for non-ELF
+ // targets.
+ AsanGlobalsLiveSupport =
+ !TC.getTriple().isOSBinFormatELF() ||
+ Args.hasArg(options::OPT_fsanitize_address_globals_live_support);
}
// Parse -link-cxx-sanitizer flag.
@@ -716,6 +722,9 @@
if (AsanUseAfterScope)
CmdArgs.push_back(Args.MakeArgString("-fsanitize-address-use-after-scope"));
+ if (AsanGlobalsLiveSupport)
+ CmdArgs.push_back(Args.MakeArgString("-fsanitize-address-globals-live-support"));
+
// MSan: Workaround for PR16386.
// ASan: This is mainly to help LSan with cases such as
// https://code.google.com/p/address-sanitizer/issues/detail?id=373
Index: lib/CodeGen/BackendUtil.cpp
===================================================================
--- lib/CodeGen/BackendUtil.cpp
+++ lib/CodeGen/BackendUtil.cpp
@@ -193,6 +193,8 @@
// where this is not a factor). Also, on ELF this feature requires an assembler
// extension that only works with -integrated-as at the moment.
static bool asanUseGlobalsGC(const Triple &T, const CodeGenOptions &CGOpts) {
+ if (!CGOpts.SanitizeAddressGlobalsLiveSupport)
+ return false;
switch (T.getObjectFormat()) {
case Triple::MachO:
case Triple::COFF:
Index: include/clang/Frontend/CodeGenOptions.def
===================================================================
--- include/clang/Frontend/CodeGenOptions.def
+++ include/clang/Frontend/CodeGenOptions.def
@@ -137,6 +137,8 @@
CODEGENOPT(SaveTempLabels , 1, 0) ///< Save temporary labels.
CODEGENOPT(SanitizeAddressUseAfterScope , 1, 0) ///< Enable use-after-scope detection
///< in AddressSanitizer
+CODEGENOPT(SanitizeAddressGlobalsLiveSupport , 1, 0) ///< Enable linker dead stripping
+ ///< of globals in AddressSanitizer
CODEGENOPT(SanitizeMemoryTrackOrigins, 2, 0) ///< Enable tracking origins in
///< MemorySanitizer
CODEGENOPT(SanitizeMemoryUseAfterDtor, 1, 0) ///< Enable use-after-delete detection
Index: include/clang/Driver/SanitizerArgs.h
===================================================================
--- include/clang/Driver/SanitizerArgs.h
+++ include/clang/Driver/SanitizerArgs.h
@@ -35,6 +35,7 @@
int AsanFieldPadding = 0;
bool AsanSharedRuntime = false;
bool AsanUseAfterScope = true;
+ bool AsanGlobalsLiveSupport = false;
bool LinkCXXRuntimes = false;
bool NeedPIE = false;
bool Stats = false;
Index: include/clang/Driver/Options.td
===================================================================
--- include/clang/Driver/Options.td
+++ include/clang/Driver/Options.td
@@ -827,6 +827,9 @@
Group<f_clang_Group>,
Flags<[CoreOption, DriverOption]>,
HelpText<"Disable use-after-scope detection in AddressSanitizer">;
+def fsanitize_address_globals_live_support : Flag<["-"], "fsanitize-address-globals-live-support">,
+ Group<f_clang_Group>,
+ HelpText<"Enable linker dead stripping of globals in AddressSanitizer">;
def fsanitize_recover : Flag<["-"], "fsanitize-recover">, Group<f_clang_Group>;
def fno_sanitize_recover : Flag<["-"], "fno-sanitize-recover">,
Flags<[CoreOption, DriverOption]>,
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